Yes, a serious fluid head has smooth operation, constant (ideally adjustable) drag, no backlash, and adjustable counterbalance. And it is important to match the head to the weight and balance of the camera, especially when tilting.
But not everyone can justify the high cost of a serious fluid head, and good results can be obtained with a decent lesser head, especially if all you need is smooth panning.
The point of Krytox is to deal with friction from bearing design, wear, or contamination, rather than the fluid. For example, I had a modest tripod with too much uneven friction, perhaps from being overtightened at some point, that I was able to restore to smooth panning (no tilt or diagonal) with a few small drops of Krytox.